| dc.description | Tomato (Lycopersicon lycopersicum L.) belonging to the family solanaceae is one of the
most important, popular and nutritious vegetable crops grown in the country. It is abundantly
available in the winter season in Bangladesh. At present, tomato ranks third next to potato
and sweet potato in terms of world vegetable production (FAO, 2008) and tops the list of
canned vegetables (Choudhury, 1979). Besides, it ranks second in importance to potato in the
tropics on the basis of production and economic importance. In Bangladesh, 19.8 thousand
hectare of land was under cultivation of tomato where total production was 143.0 thousand
metric tons per annum approximately (BBS, 2008). However, its yield in Bangladesh (6.82 t /
ha) is much lower compared to even the neighbouring countries like India (17.00 t / ha),
Pakistan (9.67 t / ha), Srilanka (7.57 t / ha), Philippines (8.77 t / ha) and Thailand (23.79 t /
ha) as per FAO (2008) because of its poor agronomic practices and lack of proper disease
management (Hassan et al. 2005 a). | en_US |
| dc.description.abstract | Extracts of botanicals viz. leaf extracts of neem (Azadirachta indica), marigold (Tagetes
patula), dholkalmi (Ipomoea fistulosa), bashak (Adhatoda vasica), shatodrone (Leucas
aspera), tulsi (Ocimum sanctum), datura (Datura metal), durba (Cynodon dactylon), thunkuni
(Centella asiatica) and biskathali (Polygonum hydropiper); rhizome extracts of ginger
(Zingiber officinale) and turmeric (Curcuma longa); mustard (Brassica campestris) oil-cake
extract, bulb extract of onion (Allium cepa) and garlic (Allium sativum); fruit extracts of
bitter-gourd (Momordica charantia) and pineapple (Ananas comosus) and root extract of
shatamuli (Asparagus racemosus) along with BAU-Biofungicide were evaluated in the
laboratory on juvenile (Jz stage) mortality of Meloidogyne javanica. The studies were
conducted in the laboratory and in the field laboratory of the Department of Plant Pathology,
Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur,
Bangladesh. Out of eighteen extracts of botanicals, Adhatoda vasica (S/100) has been found
more effective followed by Ananas comosus (S/10), Brassica napus oil-cake (S/10) and
Tagetes patula (S/10) on 100% juvenile (Jz stage) mortality of Meloidogyne javanica after 96
hour of exposure in-vitro. BAU-Biofungicide (2%) exerted superior result on juvenile
mortality of Meloidogyne javanica. In case of pot experiment, seven selected extracts of
botanicals (leaf extracts of Azadirachta indica, Tagetes patula, Ipomoea fistulosa and
Adhatoda vasica; rhizome extract of Zingiber officinale, oil-cake extract of Brassica
campestris and fruit extract of Ananas comosus) and BAU-Biofungicide were evaluated
against root-knot (Meloidogyne javanica) of tomato var. Raton. Out of the botanical extracts,
bashak (Adhatoda vasica) followed by pineapple (Ananas comosus) showed better
performance on shoot and root length, shoot and root weight with higher yield of tomato
consequently with the reduced galling as well as suppressed number of eggmass, Jo, J3, J4
stages and adult females of Meloidogyne javanica. But BAU-Biofungicide was found
superior over the extracts of botanicals. In seedbed experiment, seed treatment with BAUBiofungicide resulted higher response on plant growth of tomato as well as reduced galling
incidence, eggmass, juveniles and adult female in tomato root-knot (Meloidogyne javanica)
of 30 days old tomato seedling over the control. The selected extracts of botanicals (leaf
extracts of Azadirachta indica, Tagetes patula, Ipomoea fistulosa and Adhatoda vasica,
thizome extract of Zingiber officinale, oil-cake extract of Brassica campestris and fruit
extract of Ananas comosus), BAU-Biofungicide and curaterr were evaluated against rootknot (Meloidogyne javanica) of tomato var. Raton under field condition. Higher plant growth
(length of shoot and root, weight of shoot and root), fruit yield (number of fruit as well as
weight of fruit per plant) corresponding lower galling incidence (number of galls/g root),
eggmass, Jo, J3, J4 and adult females in tomato plants were recorded by applying BAUBiofungicide and curaterr. Out of the extracts of botanicals used, Adhatoda vasica was found
superior in controlling root-knot (Meloidogyne javanica) of tomato followed by Ananas
comosus by root dipping plus soil drenching after 7 days of transplantation. The highest
benefit-cost ratio was recorded in case of BAU-Biofungicide (2%) as root dipping and soil
drenching (2%) after 7 days of transplantation followed by spraying of BAU-Biofungicide
(2%) at every 10 days interval initiated 14 days after transplantation at 90 days after
inoculation. | en_US |
